The Collaborative International Dictionary of English v.0.48:

Reak \Reak\ (r[=e]k), n. [[root]115. Cf. Wrack seaweed.]
   A rush. [Obs.] "Feeds on reaks and reeds." --Drant.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Reak \Reak\, n. [Cf. Icel. hrekkr, or E. wreak vengeance.]
   A prank. [Obs.] "They play such reaks." --Beau. & Fl.
   [1913 Webster]